Raise proper error when ModelViolationError occurs

This error occurs when repo file has invalid definition, specifically
when the 'name' entry of the config files is invalid. Also add tests.

Jira: RHEL-19249

repos/system_upgrade/common/actors/systemfacts/libraries/systemfacts.py

@@ -217,7 +217,18 @@ def get_sysctls_status():
 
 def get_repositories_status():
     """ Get a basic information about YUM repositories installed in the system """
-    return RepositoriesFacts(repositories=repofileutils.get_parsed_repofiles())
+    try:
+        return RepositoriesFacts(repositories=repofileutils.get_parsed_repofiles())
+    except repofileutils.InvalidRepoDefinition as e:
+        raise StopActorExecutionError(
+            message=str(e),
+            details={
+                'hint': 'For more directions on how to resolve the issue, see: {url}.'
+                        .format(
+                            url='https://access.redhat.com/solutions/6969001'
+                        )
+            }
+        )
 
 
 def get_selinux_status():

repos/system_upgrade/common/actors/systemfacts/tests/test_systemfacts.py

@@ -3,7 +3,16 @@
 
 import pytest
 
-from leapp.libraries.actor.systemfacts import _get_system_groups, _get_system_users, anyendswith, anyhasprefix, aslist
+from leapp.exceptions import StopActorExecutionError
+from leapp.libraries.actor.systemfacts import (
+    _get_system_groups,
+    _get_system_users,
+    anyendswith,
+    anyhasprefix,
+    aslist,
+    get_repositories_status
+)
+from leapp.libraries.common import repofileutils
 from leapp.libraries.common.testutils import logger_mocked
 from leapp.libraries.stdlib import api
 from leapp.snactor.fixture import current_actor_libraries
@@ -116,3 +125,16 @@ def __init__(self, gr_name, gr_gid, gr_mem):
                 assert group_name not in api.current_logger().dbgmsg[0]
     else:
         assert not api.current_logger().dbgmsg
+
+
+def test_failed_parsed_repofiles(monkeypatch):
+    def _raise_invalidrepo_error():
+        raise repofileutils.InvalidRepoDefinition(msg='mocked error',
+                                                  repofile='/etc/yum.repos.d/mock.repo',
+                                                  repoid='mocked repoid')
+
+    monkeypatch.setattr(repofileutils, 'get_parsed_repofiles', _raise_invalidrepo_error)
+    monkeypatch.setattr(api, 'current_logger', logger_mocked())
+
+    with pytest.raises(StopActorExecutionError):
+        get_repositories_status()

repos/system_upgrade/common/libraries/repofileutils.py

@@ -11,6 +11,16 @@
     api.current_logger().warning('repofileutils.py: failed to import dnf')
 
 
+class InvalidRepoDefinition(Exception):
+    """Raised when a repository definition is invalid."""
+    def __init__(self, msg, repofile, repoid):
+        message = 'Invalid repository definition: {repoid} in: {repofile}: {msg}'.format(
+                    repoid=repoid, repofile=repofile, msg=msg)
+        super(InvalidRepoDefinition, self).__init__(message)
+        self.repofile = repofile
+        self.repoid = repoid
+
+
 def _parse_repository(repoid, repo_data):
     def asbool(x):
         return x == '1'
@@ -33,12 +43,17 @@ def parse_repofile(repofile):
     :param repofile: Path to the repo file
     :type repofile: str
     :rtype: RepositoryFile
+    :raises InvalidRepoDefinition: If the repository definition is invalid,
+        this can for example occur if 'name' field in repository is missing or it is invalid.
     """
     data = []
     with open(repofile, mode='r') as fp:
         cp = utils.parse_config(fp, strict=False)
         for repoid in cp.sections():
-            data.append(_parse_repository(repoid, dict(cp.items(repoid))))
+            try:
+                data.append(_parse_repository(repoid, dict(cp.items(repoid))))
+            except fields.ModelViolationError as e:
+                raise InvalidRepoDefinition(e, repofile=repofile, repoid=repoid)
     return RepositoryFile(file=repofile, data=data)
 
 

repos/system_upgrade/common/libraries/tests/test_repofileutils.py

@@ -1,7 +1,10 @@
 import json
 import os
 
+import pytest
+
 from leapp.libraries.common import repofileutils
+from leapp.models.fields import ModelViolationError
 
 CUR_DIR = os.path.dirname(os.path.abspath(__file__))
 
@@ -12,6 +15,30 @@ def test_invert_dict():
     assert inv_dict == {'a': [1], 'b': [1, 2]}
 
 
+@pytest.mark.parametrize(
+    ('repoid', 'data'),
+    (
+        ('missing-name', {'baseurl': 'http://example.com', 'enabled': '1', 'gpgcheck': '1'}),
+        (None, {'name': 'name', 'baseurl': 'http://example.com', 'enabled': '1', 'gpgcheck': '1'}),
+        ('name-none', {'name': None, 'baseurl': 'http://example.com', 'enabled': '1', 'gpgcheck': '1'}),
+        ('baseurl-true', {'name': 'valid', 'baseurl': True, 'enabled': '1', 'gpgcheck': '1'}),
+    )
+)
+def test__parse_repository_missing_name(repoid, data):
+    with pytest.raises(ModelViolationError):
+        repofileutils._parse_repository(repoid, data)
+
+
+def test_parse_repofile_error(monkeypatch):
+    def _parse_repository_mocked(*args, **kwargs):
+        raise ModelViolationError('')
+
+    monkeypatch.setattr(repofileutils, '_parse_repository', _parse_repository_mocked)
+
+    with pytest.raises(repofileutils.InvalidRepoDefinition):
+        repofileutils.parse_repofile(os.path.join(CUR_DIR, 'sample_repos.txt'))
+
+
 def test_parse_repofile():
     repofile = repofileutils.parse_repofile(os.path.join(CUR_DIR, 'sample_repos.txt'))